Barbarian isn't always a class as in 'Conan' For instance, I have a barbarian/cleric gnome who is completely civilized, he's a barbarian because he was taught to fight by Goblins ie, pick up something heavy and get mad. So... barbaric could just be that your character isn't 'conventional' My character follows Folian S'pae, but you could be a barbarian and follow just about any diety, or none at all.
As far as writing a good bio, get striaght in your head WHAT you want your PC to start out like, then give him/her a past that would get someone to that point. The more detail the better really.
As far as the time it takes... it could be 10 minutes... it might not happen untill tomorrow. The approvers aren't on a schedule, they do it on their spare time.
Vyris